"Mac OS X can't repair the disk . . ." about THREE drives at once!?

Nbar, thanks! I did not know about the "known bug in ML with RAID configurations involving drives 2.2 TB or larger." I've been using these two drives for a couple of years and haven't had any trouble until now. Is that 2.2TB for the full RAID or each partition -- i.e., would I be safter with a 4TB drive set up as RAID1? Any other info you have on this bug would be helpful.

I don't think the TM drive was encrypted, but I'm really not sure. Just a couple of weeks ago I got a message from a third-party program called Drive Genius that my Macintosh HD (i.e., the main internal HD of my MacBook Pro) had 3 bad blocks and that it should be backed up, erased with zeros, and restored from the backup. So (after visiting the Apple store where they did not see any bad blocks but admitted they might be missing something that Drive Genius was detecting), I confirmed that my TM backup was recent, erased my internal drive with zeros, and restored from the TM drive. That's a long answer, but the point is I don't recall having to enter any special password to restore from the TM drive -- which I imagine I would have to do if it were encrypted, right?

The FAR BIGGER issue this morning is that my computer is NOT STARTING AT ALL. Last night, I went to bed while the 6TB Cal Digit RAID1 drive was about 6 hours into an 8-hour transfer all of its contents onto a new LaCie 3TB thunderbolt drive that I purchased yesterday. When I woke up, I checked both drives, and it seemed like the transfer had gone fine. But I thought it might be a good idea to unmount both drives, shut the computer competely down, and restart. If there had been somehting going wrong in the unmounting process, then, I thought, perhaps when I restarted I'd get a message about the new LaCie drive saying "Mac OS X can't repair the disk . . ."

After I clicked "Shut Down" though, I got a message I'd never seen before. It said something to the effect that if I shut down now other users logged in might lose any unsaved changes. I do have a "Guest" account, which I switched over to, saw that iPhoto was open, shut iPhoto, and swtiched back to my main user account. But when I tried to shut down, I got the same message. I screen captured the message, unmounted the two drives, and shut down the machine. When I restarted, I figured it couldn't hurt to reset the P-RAM so when I turned the computer back on, after the first chime, I held down Apple-Option-P-R and let it chime two more times. After which it began to start -- the Apple symbol and the spinning wheel appeared for 10-15 seconds -- and then the screen went black and the machine shut off. I tired starting a few more times but with no luck. I am, of course, headed back to the Apple store today, but do you have any thoughts?

Thanks!
Harry